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The Fennec Lab

Hospitality / STR operator economics

Vacation Rental Operations Calculators

Operator economics for short-term rental hosts — the minimum Average Daily Rate (ADR) needed to cover mortgage, tax, insurance, cleaning, capex reserves, OTA fees, and lodging-tax remittance at a target occupancy, with sensitivity at occupancy ±10pp.

Anchored to: IRC §§ 469, 469(c)(7), 280A; Airbnb / Vrbo host fee disclosures; state and local lodging tax frameworks

5 calculators live. Reviewed against current statute and regulation. Last updated 2026-05-16.

Most-used calculators

IRC § 469 (passive activity loss rules)

STR Nightly Rate (ADR) Breakeven Calculator

Compute the minimum Average Daily Rate (ADR) a short-term rental needs to cover its full annual cost stack — mortgage P&I, property tax, hazard insurance, HOA dues, cleaning labor, capital-expense maintenance reserve (the depreciation-style accrual for HVAC, roof, and appliance turnover), utilities, OTA platform fees (Airbnb host-only at ~15% or split fee ~3% host + ~14% guest; Vrbo ~5% host + ~8% guest; direct booking 0% to the platform), and state + local lodging tax remittance — at a supplied target occupancy. Surfaces the required gross ADR, the cost stack itemized, a sensitivity table at occupancy ±10pp, and the net annual profit (or shortfall) at the operator's target ADR. Differs from the Florida-specific vacation-rental calculator: that one anchors on tourist development tax remittance; this one anchors on the operating-economic breakeven that applies in any STR market.

Airbnb host service fee disclosure (host-only "simplified" fee at ~15% of payout

STR Channel Fee Comparison Calculator

Side-by-side comparison of net revenue per booking across Airbnb (host-only ~15%), Vrbo (~5% host + ~8% guest), Booking.com (~15% host commission, no guest fee), and direct booking (0% platform fee but merchant processing of ~2.9% + $0.30 per transaction plus operator-borne marketing cost). Models displayed-price impact on demand via a configurable elasticity coefficient, layers cancellation rate on top, and surfaces the recommended channel mix plus the breakeven annual booking volume required to justify each channel's fixed cost. Differs from the nightly-rate breakeven calculator: that one solves for the minimum gross ADR to cover the cost stack; this one assumes a fixed nightly rate and compares net revenue across channels.

Constant-elasticity demand model (Q(P) = Q0 × (P/P0)^elasticity)

STR Occupancy & Pricing Elasticity Calculator

Solves for the recommended nightly rate using the same constant-elasticity demand model that PriceLabs, Beyond Pricing, Wheelhouse, and AirDNA Smart Rates run internally. Anchors the elasticity-implied rate against the comp-set average within a configurable bound (default ±30%), applies a seasonality multiplier, and modulates by a days-out booking-window adjustment (planners pay a premium, last-minute bookers expect a discount). Returns the recommended rate, expected occupancy at that rate, expected revenue per night, and a ±10% sensitivity table so the operator can sanity-check the dynamic-pricing tool's output against the underlying math.

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For LCAMs & community managers

Operational tools for the day-to-day: estoppel preparation, statutory cap verification, hearing procedure.

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Verify a notice, check a fine, or understand the lien exposure on a delinquent account before acting.

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How these calculators are maintained

Every YMYL calculator is reviewed quarterly and after every legislative session in the jurisdiction it covers. Citations are link-validated monthly against the relevant statute and regulation websites. The methodology page documents the discipline.

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